Re: [U-Boot-Users] POST tests without OCM

15 Dec 2007


      Yes I am using the 440EP.  I was referring to all the code in
cpu/ppc4xx/commproc.c, like this section:
#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
void post_word_store (ulong a)
{
    volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR +
CFG_POST_WORD_ADDR);
    *(volatile ulong *) save_addr = a;
}
ulong post_word_load (void)
{
    volatile void *save_addr = (volatile void *)(CFG_OCM_DATA_ADDR +
CFG_POST_WORD_ADDR);
    return *(volatile ulong *) save_addr;
}
There are a few more functions in there that refer to the OCM.
What/where is the unused GPT that you are talking about?
Thanks
Craig
-----Original Message-----
From: Stefan Roese [mailto:sr@denx.de] 
Sent: Friday, December 14, 2007 4:04 PM
To: u-boot-users@lists.sourceforge.net
Cc: Craig Millen
Subject: Re: [U-Boot-Users] POST tests without OCM
Hi Craig,
On Friday 14 December 2007, Craig Millen wrote:
...
I am trying to incorporate some of the POST tests into my u-boot, but 
I do not have any on-chip-memory (OCM). A lot of the code appears to 
use OCM for storage of data/testing.
Has anyone achieved this by using the cache or any other means?
We are thinking about moving this POST_WORD from OCM to an unused GPT
(General Purpose Timer) register. You *are* talking about the 440EP,
right? This should be possible here too.
Patches are as always welcome. :)
Best regards,
Stefan
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